Important Concepts
Browse key concepts across boards and subjects. Click any concept to see explanation and related questions.
- (a) Explain the principle and working of (i) Zener diode (ii) LED
- Draw the block diagram of satellite transponder.
- Draw the block diagram of optical communication system.
- What are the factors that affect the Radar range?
- What is a pure substance?
- (i) Ruling gradient (ii) Pusher gradient (iii) Momentum gradient (iv) Grade compensation on curves
- (b) Explain the necessity and effects of coning of wheels with the help of sketches.
- (a) List down any four key characteristics of Light Rail Transit System (LRT).
- (b) Define :
- (c) What is meant by interlocking of signals and points? List down any three essential regulations.
- (d) Describe the operation of centralized train control system (CTC).
- (e) What are the important wave characteristics? Write down the inter- relationship among these char
- (a) Explain the factors involved in the selection of good alignment for a railway line. Illustrate w
- (a) Explain the functions of rails and various types of rails in use.
- (b) What are the requirement of sleepers used in a railway track? Using a sleeper density $\mathrm{N
- (b) Design a mechatronics-based modern engine management system. ..... 12
- (a) State the Clapeyron equation and explain.
- What is an equation of state ?
- What is an equation of state ?
- (b) A constant volume chamber of $0.3 \mathrm{~m}^{3}$ capacity contains 1 kg of air at $5^{\circ} \
- (b) A certain gas ha $\mathrm{c}_{\mathrm{p}}=1.968$ and $\mathrm{c}_{\mathrm{v}}=1.507 \mathrm{~kJ}
- A mass of air is initially at $260^{\circ} \mathrm{C}$ and 700 kPa , and occupies $0028 \mathrm{~m}^
- Define polytropic process. Answer any one full question from each Module. Each question carries 20
- Define Boyle temperature. Answer any one full question from each Module. Each question carries $\ma
- Define Boyle temperature. Answer any one full question from each Module. Each question carries $\ma
- (a) Express the changes in internal energy and enthalpy of an ideal gas in a reversible adiabatic pr
- Express the changes in internal energy and enthalpy of an ideal gas mixture in a reversible adiabati
- Express the changes in internal energy and enthalpy of an ideal gas mixture in a reversible adiabati
- What is the fundamental property of gases with respect to the product pv ?
- What is the fundamental property of gases with respect to the product pv ?
- What is the fundamental property of gases with respect to the product pv ?
- What is the fundamental property of gases with respect to the product pv ?
- Define compressibility factor and reduced properties.
- State the Dalton's law of partial pressure. What you mean by partial volume of a mixture of gases?
- Define the terms; (a) dew point temperature and (b) absolute humidity of moist air. Answer one full
- (b) Describe the construction and thermodynamics of a constant volume gas thermometer. Also, briefly
- (c) The output voltage of a thermocouple with the test junction at $t^{\circ} \mathrm{c}$ on gas the
- (b) Deduce the steady flow energy equation for simple steady flow process.
- (a) Explain any two range finding methods using laser beams. ..... 8
- Define Main Idea and Supporting Details.
- (a) Draw the block diagram of function generator and explain its working.
- (a) Draw the block diagram of super heterodyne receiver and explain its working.
- (b) Draw the block diagram of FM transmitter, explain its working. OR
- (c) During one cycle of operation the working fluid in an engine engages in two work interactions an
- (a) What is Clausius inequality? Explain.
- (a) What is Clausius inequality? Explain.
- (b) Explain the concept of degradation of energy and entropy generation.
- (b) Explain the concept of degradation of energy and entropy generation.
- (c) Explain the causes for entropy increase in any closed system.
- (c) Explain the causes for entropy increase in any closed system.
- (b) State the equation of state of an ideal gas. What are universal and characteristics gas constant
- (b) State the equation of state of an ideal gas. What are universal and characteristics gas constant
- (c) What are Virial expressions?
- (a) Draw the p -T diagram of a pure substance and explain.
- (a) Draw the p -T diagram of a pure substance and explain.
- (b) Steam at 100 kPa and dryness fraction of 0.95 is supplied to a heating system. The amount of hea
- (b) Steam at 100 kPa and dryness fraction of 0.95 is supplied to a heating system. The amount of hea
- (a) What is the working principle of SMPS?
- (a) Explain the working principle of LED. Explain the method of generation of different colours in L
- (b) Discuss the working principle of solar cell and photo diode and differentiate them.
- What is Parallax error? How it is eliminated?
- Explain the merits of Ready Mixed Concrete.
- (a) What are the desirable qualities of coarse aggregate?
- (b) Which are the tests on cement? Explain setting time test as per the I.S code. OR
- Name the methods of booking level staff reading. What are the merits and demerits?
- Hint on Environmental issues of (a) Global warming
- Hint on Environmental issues of (b) Deforestation
- Explain the working principle of LED ?
- What is an ideal Diode ? Draw its characteristics ?
- Define RMS value and average value of an alternating quantity.
- State and explain Lenz's law.
- Define: 1) mmf 2) Reluctance.
- Explain the concept of phase and phase difference.
- What are the advantages of High Voltage transmission ?
- Distinguish between core type and shell type construction of Transformer core.
- Compare Hydro-electric and Thermal power generation.
- (c) Explain the terms; (i) latent heat and (ii) sensible heat.
- (c) Explain the terms; (i) latent heat and (ii) sensible heat.
- (a) Show that the density of a mixture of ideal gases is equal to the sum of their partial densities
- (a) Show that the density of a mixture of ideal gases is equal to the sum of their partial densities
- (b) Find the increase in entropy when 2 kg of oxygen at $60^{\circ} \mathrm{C}$ are mixed with 5.8 k
- (b) Find the increase in entropy when 2 kg of oxygen at $60^{\circ} \mathrm{C}$ are mixed with 5.8 k
- (a) With a T-S diagram explain the adiabatic cooling of water vapour in a air-vapour mixture.
- (a) With a T-S diagram explain the adiabatic cooling of water vapour in a air-vapour mixture.
- (b) Draw the skeleton of a psychrometric chart and show the variables on the axes, lines of enthalpy
- (b) Draw the skeleton of a psychrometric chart and show the variables on the axes, lines of enthalpy
- (c) A sling's psychrometer reads $40^{\circ} \mathrm{C}$ dry bulb temperature ad $36^{\circ} \mathrm
- (c) A sling's psychrometer reads $40^{\circ} \mathrm{C}$ dry bulb temperature ad $36^{\circ} \mathrm
- Why is the Carnot cycle on T-s plot a rectangle?
- What is Avogadro's law?
- What is a mole?
- What is Boltzmann constant?
- (b) A rigid tank containing $0.4 \mathrm{~m}^{3}$ of air at 400 kPa and $30^{\circ} \mathrm{C}$ is c
- (a) Explain in detail about the path function and point function.
- Define radiation resistance. Derive the expression for radiation resistance of short dipole.
- (i) mass of carbon per Kg of dry flue gas and (ii) A/F ratio.
- Draw the circuit for a Capacitor filter and explain how does it reduce the ripple factor? Answer on
- $230 \mathrm{~V}, 50 \mathrm{~Hz}$ 1) RMS value 2) Average value. OR
- Module - III